My daughter is 7 months old, she rolled tummy to back what feels like ages ago, but has only rolled back to tummy 3 times and I think it was by accident. She rolls onto her side and looks behind her but won't flip over. She's sitting unassisted and can stand for about 30 seconds if she has a chair or something to hold onto. She also leans forwards from a sitting position and launches herself forwards, like she's trying to crawl. Now that she can sit, she doesn't like to lie in her back so rarely gets time to practice. Just wondering whether this is normal or whether she's delayed, and whether I need to be trying to make her roll?